Baking onto a 'project from view' UV
So the way to do this is as follows:
1: Make a new UV Map in Object Data Properties &lt; UV Maps (make sure to select it).

2: Make a new image in the UV editor.

3: Arrange the new UV in the new image how you want it to be.

4: Add a UV Map node to the Shader Editor; connect it to the image texture node (mine is called 'Bake'); select the new UV Map (mine is called 'model-bake'). Select the new image in the image texture node (also called 'Bake').

5: Bake!